pmpon uii ol lree surlaee wiler, some beeause ur
lreedraiiuiig mxls pr deep or miss sands. orhei aieas
are ipo ibelry, or D! assured luiiesioue, aud ye: plheis
are iiiu sleep or uiislablr bui a geai iriauy pmdlkhve
areas ni elay-lraeiiou subsoils 140% or iiipre rlay
lraeiiuui will hold waier behind earili daiiis, belnw
grade leyels di earilii iaiihs, rir peielied above grade as
iurlrey-s nESI' or ring dariis There are very lew
limmnpfi, however, mal will rush smie MON sell waier
ii humus, soil ireaiiiieui, m swales are iried, ihe so“
iisell IS our largtfl waier slorage sysleiu iii laudseape il
we AM»: u id absorb.

Aliripsr every iype ui dam is cosielieeiiye il ii is
leeaied iu peu waier iii aii aiea pl 5% or less slope.
However, ruaiiy esseiiiial dams, ii well»iiiade aud
durable, eaii be buili ai hiywr slopes or grades, iriade
bi euiieiere, Mbwalled, m eaeaydied ii waler liar a
house a! small seiileiiieui is ihe liruiriiig lariur. saeh
aud every dairi needs eareiul soil and Level surveys aud
plauriuig ipr Ion! wnsmldlon uieihbds.

DAM mas AND LOCATIONS
nieie are an leasi lhese epuiuibii dairi siles iii every
exieiiaive landscapc

SADDLE DAMS are usually llie highesi uuuilalile
sinuses, ur. saddles or hollows ui ihe skylmz piotrle a!
lulla Saddle dauis raii be hilly exeavaled beluw gimud
(yadei or wallsd W 2|er side or, or lariili sides m, llie
saddle. They raii be eiieular, ublpiip, or “mark :55"
shaped wirh horns or erieiisiuus a: eiiher eud mauie
w.
usg wildlifeamck. highsiurage.

RIDGEPOINT DAMS dr “holishoe' daiiis aie buill
ml ihe sub—plateaus pl “Illlned ridges, umally on a
dewendlng ridgeliue, aiid beluw saddle dam. The

vwzaou vmus (Ami mum:
mm mm, 13?:- mo war”
10 Twaflhum Mus

k1: (UT AT IJ-so-s'oe "9%

swim

SADDLE DAM
VllY imil lui liia mmml, mldlni. Ilium imailrui lhe 'Nfihlsl'
hype M dam in nu Indian! irai ms liiuii hill mum

 

158

 

lawusiuw DUNS/I I

   

\\

fibv\or re] vanki

 

shuwyfi I |
(w a»: pm To NEXI’ m9

 

W “scum w numb: Nxzuré
"suns 1.5

RIDEEPOM {MM

m vim-shri- dam. nuiil on plum areas ul mines ans u «in
sadder-m

 

 

 

 

shape is kypiully lhai or a horse's ml. ii an be made
beldw grade, or walled by eairli banks (“gnu 1,57.
um: A; ldr saddle dams, Only 0! liiiiiied xmsilmn
use, bur very userul 1m run—Mi and pumped sidrages.
None ihal bani saddle aud ndgz darris raii an as
slorages {Mpumped wareruaed lur energy generafimi,
KEYPO|NT DAMS are lpeaied iri ilie valleys pl
seeaaiidary slreairis, huuud landscapes, an lhe highest
praeiieal eryrisrrueririu point in «he lull pmfill, usually
where ihe strum prolile changes lrpiri euiiyea lo
euueaye; rhis place eaii be purified by eye, aiid a
dereeridiiig euuiour Will ilieii pielr up all bilier
keyppiriis ui. uie iiiairi valley irlguie 7.5).
@ Primarily iii sipre 1mg iui. waier None ihai a
mud in ihiid series sari be ruii below rhis pruiiary
wnes ul dauis, aud dial Lh: splllway bi the lasi daiii iii
a series eau be iehiraied 'Ilpstreim“ rd rueei lhe iiiaiii
valley, eneerively spilliiip surplus id sueaiiis
coN'louK DAM walls eaii be buili uii eduipur
wherever rhe dope x5 5% ur less, or suiiiaeriily nai.
Coulouis (aud daiu wallsl tan be suruave dr rprwex in
[he lall lirie amass ihe dispeiriguie m
U756. Iniglhnni aquaculiuie, or floodrfluw basiris ii.